class Settings():
	""" 存储《外星人入侵》的所有设置的类"""
	
	def __init__(self):
		"""初始化游戏的设置"""
		# set screen
		self.screen_width = 1000
		self.screen_height = 500
		self.bg_color = (230,230,230)
		
		# 飞船的设置
		self.ship_speed_factor = 1.5
		self.ship_limit = 3
		
		# 子弹设置
		self.bullet_speed_factor = 1
		self.bullet_width = 3
		self.bullet_height = 15
		self.bullet_color = 60,60,60
		self.bullet_allowed = 5
		
		# 外星人设置
		self.alien_speed_factor = 1
		self.fleet_drop_speed = 10
			
		# fleet_direction 为1表示右移，为-1表示左移
		self.fleet_direction = 1
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		